公开(公告)号：US20240171430A1

公开(公告)日：2024-05-23

申请号：US18152817

申请日：2023-01-11

Applicant: NXP USA, Inc.

Inventor： Vijay Ahirwar ,  Nilesh Nilkanth Khude ,  Hari Ram Balakrishnan ,  Sudhir Srinivasa ,  Olivier Jerome Celestin Jamin

IPC: H04L25/08 ,  H04B7/0413

CPC classification number: H04L25/08 ,  H04B7/0413

Abstract: A multi-radio system comprises a first radio and a second radio co-located on the multi-radio system. The first radio is arranged to generate an RF transmit signal which is output by a first antenna of the first radio. In an example, the first radio comprises a radio frequency (RF) canceller arranged to output a RF cancellation signal which couples with the RF transmit signal received at a second antenna of the second radio. The RF cancellation signal that is output results in the cancellation of the RF transmit signal at the second antenna of the second radio.

公开(公告)号：US11742897B2

公开(公告)日：2023-08-29

申请号：US17369923

申请日：2021-07-07

Applicant: NXP USA, Inc.

Inventor： Hari Ram Balakrishnan ,  Sudhir Srinivasa

IPC: H04B7/024 ,  H04B7/0452 ,  H04L5/00 ,  H04W72/04 ,  H04W72/0453

CPC classification number: H04B7/024 ,  H04B7/0452 ,  H04L5/0048 ,  H04W72/0453

Abstract: Embodiments of a method and an apparatus for wireless communications are disclosed. In an embodiment, a method for wireless communications involves assigning subcarriers of a first access point (AP) and a second AP to a subcarrier set of a virtual AP, generating, by the virtual AP, a packet that includes a signal for a station (STA) and that is transmitted using the subcarrier set, where generating the packet includes: encoding a preamble portion of the packet on the assigned subcarriers included in the subcarrier set, nulling the preamble portion of the packet for unassigned subcarriers of the first AP and the second AP, encoding a subsequent portion of the packet according to a Distributed Multiple-Input Multiple-Output (DMIMO) transmission, and transmitting the packet to the STA.

公开(公告)号：US20240291698A1

公开(公告)日：2024-08-29

申请号：US18589362

申请日：2024-02-27

Applicant: NXP USA, Inc.

Inventor： Priyanka Bansal ,  Hari Ram Balakrishnan ,  Sudhir Srinivasa ,  Rui Cao

IPC: H04L25/03 ,  H04L27/26

CPC classification number: H04L25/03866 ,  H04L27/2602

Abstract: A wireless communication system, apparatus, and methodology are described for enabling wireless communication devices to generate extended range Physical Layer Protocol Data Units (PPDUs) for wireless transmission to a destination communication devices by generating, at a first wireless communication device, a data sequence in which a plurality of repeated data symbols are encoded for wireless transmission to the second communication device, and then applying a scrambling sequence that is known to the first and second communication devices to the data sequence to generate an output data sequence wherein the plurality of repeated data symbols are pseudo-randomized prior to performing an inverse Fourier transform on the output data sequence.

公开(公告)号：US20240022459A1

公开(公告)日：2024-01-18

申请号：US18347801

申请日：2023-07-06

Applicant: NXP USA, Inc.

Inventor： Hongyuan Zhang ,  Hari Ram Balakrishnan ,  Sudhir Srinivasa

IPC: H04L27/20 ,  H04L5/00 ,  H04L1/00

CPC classification number: H04L27/20 ,  H04L5/0053 ,  H04L1/0043

Abstract: A method and system comprises receiving a signal over an air interface. A binary sequence is detected in the signal. A legacy signal (L-SIG) field of a physical layer protocol data circuit (PPDU) is decoded based on the detected binary sequence and based on decoding the L-SIG field, two spoofing symbols which directly follow the L-SIG field is checked in the PPDU, wherein the two spoofing symbols comprise binary phase shift keying (BPSK) symbols. Based a presence of the two spoofing symbols, a long range portion of the PPDU is processed; and based on an absence of the two spoofing symbols, the PPDU is processed as a legacy PPDU.

公开(公告)号：US20220014238A1

公开(公告)日：2022-01-13

申请号：US17369923

申请日：2021-07-07

Applicant: NXP USA, Inc.

Inventor： Hari Ram Balakrishnan ,  Sudhir Srinivasa

IPC: H04B7/024 ,  H04B7/0452 ,  H04L5/00 ,  H04W72/04

Abstract: Embodiments of a method and an apparatus for wireless communications are disclosed. In an embodiment, a method for wireless communications involves assigning subcarriers of a first access point (AP) and a second AP to a subcarrier set of a virtual AP, generating, by the virtual AP, a packet that includes a signal for a station (STA) and that is transmitted using the subcarrier set, where generating the packet includes: encoding a preamble portion of the packet on the assigned subcarriers included in the subcarrier set, nulling the preamble portion of the packet for unassigned subcarriers of the first AP and the second AP, encoding a subsequent portion of the packet according to a Distributed Multiple-Input Multiple-Output (DMIMO) transmission, and transmitting the packet to the STA.

公开(公告)号：US20210392661A1

公开(公告)日：2021-12-16

申请号：US17349809

申请日：2021-06-16

Applicant: NXP USA, Inc.

Inventor： Rui Cao ,  Hongyuan Zhang ,  Yan Zhang ,  Liwen Chu ,  Hari Ram Balakrishnan ,  Sudhir Srinivasa

IPC: H04W72/12 ,  H04W72/04 ,  H04L5/00

Abstract: Embodiments of a method and an apparatus for wireless communications are disclosed. In an embodiment, a method for wireless communications involves generating a Physical Layer Protocol Data Unit (PPDU) that includes a resource unit (RU), wherein a size of the RU is less than a signal bandwidth and wherein data corresponding to the RU is distributed onto a disjoint set of subcarriers included in a frequency unit, and transmitting the PPDU using the disjoint set of subcarriers in accordance with a power spectrum density (PSD) limit.

公开(公告)号：US20250168705A1

公开(公告)日：2025-05-22

申请号：US18955138

申请日：2024-11-21

Applicant: NXP USA, Inc.

Inventor： Hari Ram Balakrishnan ,  Liwen Chu ,  Sudhir Srinivasa ,  Xiayu Zheng

IPC: H04W28/18 ,  H04L5/00 ,  H04W48/16

Abstract: Embodiments of a method and apparatus for communications are disclosed. In an embodiment, a communications device includes a controller configured to generate a null data packet (NDP) announcement (NDPA) frame carrying a special station (STA) information (info) field, where the special STA info field contains information that indicates the NDPA frame as having an Ultra High Reliability (UHR) NDPA frame format, and a wireless transceiver configured to wirelessly transmit the NDPA frame to a second wireless device.

公开(公告)号：US11937230B2

公开(公告)日：2024-03-19

申请号：US17349809

申请日：2021-06-16

Applicant: NXP USA, Inc.

Inventor： Rui Cao ,  Hongyuan Zhang ,  Yan Zhang ,  Liwen Chu ,  Hari Ram Balakrishnan ,  Sudhir Srinivasa

IPC: H04W4/00 ,  H04L5/00 ,  H04W72/0453 ,  H04W72/1263

CPC classification number: H04W72/1263 ,  H04L5/001 ,  H04W72/0453

Abstract: Embodiments of a method and an apparatus for wireless communications are disclosed. In an embodiment, a method for wireless communications involves generating a Physical Layer Protocol Data Unit (PPDU) that includes a resource unit (RU), wherein a size of the RU is less than a signal bandwidth and wherein data corresponding to the RU is distributed onto a disjoint set of subcarriers included in a frequency unit, and transmitting the PPDU using the disjoint set of subcarriers in accordance with a power spectrum density (PSD) limit.

公开(公告)号：US20240015059A1

公开(公告)日：2024-01-11

申请号：US18347769

申请日：2023-07-06

Applicant: NXP USA, Inc.

Inventor： Hari Ram Balakrishnan ,  Sudhir Srinivasa ,  Rui Cao ,  Hongyuan Zhang ,  Sergey Timofeev ,  Rong Zhang ,  Priyanka Bansal

IPC: H04L27/26 ,  H04L27/20 ,  H04L5/00

CPC classification number: H04L27/26132 ,  H04L27/2085 ,  H04L5/0007

Abstract: A method and system for generating an extended range (ER) physical layer protocol data unit (PPDU) is disclosed. The PPDU has a legacy portion of the ER PPDU which comprises one or more of a legacy short training field (L-STF), a legacy long training field (L-LTF), and a universal signaling (U-SIG) field and an ER portion of the ER PPDU which is appended to the legacy portion. The ER portion comprises one or more repetitions of a ER short training field (ER-STF), a ER long training field (ER-LTF), a ER-signal (ER-SIG) field, and a ER data field. In an example, signals indicative of the one or more repetitions for a same field are combined by a receiver to increase a signal to noise ratio of a field.

公开(公告)号：US20210336752A1

公开(公告)日：2021-10-28

申请号：US17239363

申请日：2021-04-23

Applicant: NXP USA, Inc.

Inventor： Young Hoon Kwon ,  Rui Cao ,  Liwen Chu ,  Hongyuan Zhang ,  Hari Ram Balakrishnan ,  Sudhir Srinivasa ,  Sayak Roy ,  Xiayu Zheng

IPC: H04L5/00 ,  H04L1/18 ,  H04L25/02 ,  H04L1/00

Abstract: Embodiments of a method and an apparatus for wireless communications are disclosed. In an embodiment, a method for wireless communications involves operating an Access Point (AP) using feedback subcarrier indices for a bandwidth up to 320 MHz, signaling, by the AP, to a client, a subcarrier location set on which a feedback report is solicited, signaling, by the AP, to a client, a feedback type solicited on the subcarrier location, and indicating, by the client, feedback subcarrier indices for the subcarrier location set via the feedback report solicited by the AP.